Alright, let's work through 87909953 times 61117506 step by step
87909953 × 61117506 = 61117506 × (87909953)
+ 61117506 × 3 giving us 183352518
+ 61117506 × 50 yielding 3055875300
+ 61117506 × 900 giving us 55005755400
+ 61117506 × 9000 producing 550057554000
+ 61117506 × 00000 resulting in 0
+ 61117506 × 900000 resulting in 55005755400000
+ 61117506 × 7000000 resulting in 427822542000000
+ 61117506 × 80000000 that results in 4889400480000000

= 5372837079937218
